This item is a set of 10 band pass filters (BPF), one for each of the HF bands 160, 80, 60, 40, 30, 20, 17, 15, 12 and 10m. The filters are designed for receiver input filtering and use the popular double-tuned-circuit which is reliable and easy to build, without needing access to any special equipment. The kits…
Antenna Rotator with Arduino. More info on www.ea7hg.com or ea7hg@hotmail.com https://www.youtube.com/watch?v=N6pSJuTp1pE https://www.youtube.com/watch?v=rb6bFKrHNz4
The RFzero™ board is an Arduino compatible GPS based Si5351A RF signal source. The typical use of the RFzero™ is as a beacon (IBP, SPB, CW, FT8, JT9, PI4 and WSPR), signal generator, VFO, Qatari Oscar 100 dual LO or a low cost 10 MHz GPSDO. A dozen of programs (sketches) are integrated into the…
Amateur Radio Antenna Remote Disconnect for Lightning Protection from alk on Vimeo. Video by Art K4FWJ A single lightning strike can destroy thousands of dollars worth of radio equipment. Experienced amateur radio operators know the only sure protection is complete disconnection. This can be a chore, especially when multiple antennas are involved. As well, it…
Hambuilder HBR4HF (4 Band HF Transceiver) by E-bay: The packet consist of: HBR4HF board exciter + LPF + BPF + PA (assembled and tested) RTC01C (16×2 LCD display) Controller with si5351 synthesizer VFO/BFO (assembled and tested) Aluminum enclosure with heatsink and related connector (need to assembly by your self) Condenser mic with loudspeaker (need to…